Experiments on the unsteady ground vortex

John Michael Cimbala; Donald P. Gaublomme; David R. Stinebring; Michael L. Billet

doi:10.4271/892281

Experiments on the unsteady ground vortex

John Michael Cimbala, Donald P. Gaublomme, David R. Stinebring, Michael L. Billet

Mechanical Engineering

Research output: Contribution to conference › Paper › peer-review

1 Scopus citations

Abstract

The ground vortex formed by a jet impinging on the ground in the presence of a cross flow has been studied experimentally. High speed motion pictures and spectral measurements were obtained to study the unsteady features of this flowfield. A very low frequency "puffing" action was observed. Since this unsteadiness could not be correlated with any other oscillations in the flowfield, the low frequency oscillations must come from the gross features of the ground vortex itself. Namely, jet fluid accumulates in the ground vortex until the vortex is so large that the flowfield breaks up, the ground vortex is swept away, a new smaller vortex forms, and the process repeats itself.

Original language	English (US)
DOIs	https://doi.org/10.4271/892281
State	Published - Dec 1 1989
Event	Aerospace Technology Conference and Exposition - Anaheim, CA, United States Duration: Sep 25 1989 → Sep 28 1989

Other

Other	Aerospace Technology Conference and Exposition
Country/Territory	United States
City	Anaheim, CA
Period	9/25/89 → 9/28/89

All Science Journal Classification (ASJC) codes

Automotive Engineering
Safety, Risk, Reliability and Quality
Pollution
Industrial and Manufacturing Engineering

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10.4271/892281

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title = "Experiments on the unsteady ground vortex",

abstract = "The ground vortex formed by a jet impinging on the ground in the presence of a cross flow has been studied experimentally. High speed motion pictures and spectral measurements were obtained to study the unsteady features of this flowfield. A very low frequency {"}puffing{"} action was observed. Since this unsteadiness could not be correlated with any other oscillations in the flowfield, the low frequency oscillations must come from the gross features of the ground vortex itself. Namely, jet fluid accumulates in the ground vortex until the vortex is so large that the flowfield breaks up, the ground vortex is swept away, a new smaller vortex forms, and the process repeats itself.",

author = "Cimbala, {John Michael} and Gaublomme, {Donald P.} and Stinebring, {David R.} and Billet, {Michael L.}",

year = "1989",

month = dec,

day = "1",

doi = "10.4271/892281",

language = "English (US)",

note = "Aerospace Technology Conference and Exposition ; Conference date: 25-09-1989 Through 28-09-1989",

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TY - CONF

T1 - Experiments on the unsteady ground vortex

AU - Cimbala, John Michael

AU - Gaublomme, Donald P.

AU - Stinebring, David R.

AU - Billet, Michael L.

PY - 1989/12/1

Y1 - 1989/12/1

N2 - The ground vortex formed by a jet impinging on the ground in the presence of a cross flow has been studied experimentally. High speed motion pictures and spectral measurements were obtained to study the unsteady features of this flowfield. A very low frequency "puffing" action was observed. Since this unsteadiness could not be correlated with any other oscillations in the flowfield, the low frequency oscillations must come from the gross features of the ground vortex itself. Namely, jet fluid accumulates in the ground vortex until the vortex is so large that the flowfield breaks up, the ground vortex is swept away, a new smaller vortex forms, and the process repeats itself.

AB - The ground vortex formed by a jet impinging on the ground in the presence of a cross flow has been studied experimentally. High speed motion pictures and spectral measurements were obtained to study the unsteady features of this flowfield. A very low frequency "puffing" action was observed. Since this unsteadiness could not be correlated with any other oscillations in the flowfield, the low frequency oscillations must come from the gross features of the ground vortex itself. Namely, jet fluid accumulates in the ground vortex until the vortex is so large that the flowfield breaks up, the ground vortex is swept away, a new smaller vortex forms, and the process repeats itself.

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U2 - 10.4271/892281

DO - 10.4271/892281

M3 - Paper

T2 - Aerospace Technology Conference and Exposition

Y2 - 25 September 1989 through 28 September 1989

ER -

Experiments on the unsteady ground vortex

Abstract

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